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A manufacturer is producing metal rods, whose lengths are normally distributed with a mean of 75.0 cm and a standard deviation of 0.25 cm. If

A manufacturer is producing metal rods, whose lengths are normally distributed with a mean of 75.0 cm and a standard deviation of 0.25 cm. If 3000 metal rods are produced, how many will be between 74.5 cm and 75.5 cm in length?

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